عَنْ زَيْدِ بْنِ ثَابِتٍ رَضِيَ اللَّهُ عَنْهُ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ مَنْ أَعْمَرَ عُمْرَى فَهِيَ لِمُعْمَرِهِ مَحْيَاهُ وَمَمَاتَهُ لَا تُرْقِبُوا فَمَنْ أَرْقَبَ شَيْئًا فَهُوَ سَبِيلُ الْمِيرَاثِ
It is narrated from Sayyiduna Zaid bin Thabit (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Whoever gives something to someone as 'Umra, then in life and death it will belong to the one to whom it was given. Do not give anything as Ruqba; whoever gives something as Ruqba, it will enter into the routine of inheritance.